US784067A - Valve-fitting. - Google Patents

Description

No. 784,067. PATENTED MAR. 7, 1905. W. R. PARK.

VALVE FITTING.

APPLICATION FILED MAY 31, 1904.

llhvrrnn biTATEt Patented March 7, 1905.

arnnr OFFICE.

'WlLLIAM R. PARK, OF TAUNTON, lViASSAOIrlUSETTITS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE UNITED INJECTOR COMPANY, A CORPORATION OF NEW YORK.

VALVIE -FlTTlNG.

SPECIFICATION forming part of Letters Patent No. 78%,067, dated March 7, 1905.

Application filed May 31, 1904- Serial No. 210,472.

1'0 all who/)1, it may concern.-

Be it known that 1, WILLIAM R. PARK, a citizen of the United States, and a resident of Taunton, in the county of Bristol and State of hlassachusetts, have invented new andusetul .lIY11)l'()V(E]l'1Gl'ltS in Valve-llittings, of which the following is a specification.

My invention relates to valve-fittings, and particularly to that class of fittings used in steam-generating plants where check and stop valves are desired closing outwardly from a boiler or similar source oi pressure.

For the purpose of illustration 1 will describe a form of my invention adapted to be located in the pipe which connects the delivery of an inspirator or injector with the boiler.

A valve-fitting of the class referred to is shown and described in United States patent granted to me April 16, 1901, No. 672,008, and my present invention is an improvement upon the valve-fitting therein described.

In the valve-fitting of the patent above noted when the check-valve was to be removed. the stop-valve was closed, thus confining between the two valves a body of steam usually under high pressure which was suddenly released when the casing was opened for the removal of the check-valve, and as a result said operation was rendered more or less difiicult and dangerous to the workman. In the valve described in that'patent it was also necessary to remove the entire fitting and transport it to the grinding-n'iachine in order to regrind the seat of the check-valve. Furthermore, the water confined in the conduit between the check-valve and the injector could not be removed bet'ore the removal of the fitting and as a result said water would escape uncontrolled as soon as the connections located between the check-valve and the injector were loosened, thus increasing the difliculty and inconvenience of the removing operation.

My present invention has for its object mainly to obviate these characteristics of the fitting oi the patent above noted and to provide an otherwise improved valve-fitting of the class described.

In accordance with my invention I prov1de a vent through the casing of the fitting between the two valves, which is normally closed by a removable stopper, so that when the check-valve is to be removed the workman can close the stop-valve and then by openii'ig the vent exhaust the steam confined between the two valves and remove the check-valve with convenience and safety.

Another feature of my invention consists in having the check-valve mounted in and seated at the end of a pipe which is removably fastened to the casing of the fitting, so that by removing said pipe both the valve and its seat can be taken out to be ground independently of the rest of the fitting.

Other valuable and novel features of my invention are hereinafter pointed out.

In the accompanying d rawing, which shows a central longitudinal sectional view of a valvefitting embodying one form of my invention, A represents a casing having an inlet a, adapted to be connected with an injector or the like and with an outlet (6', surrounded by a boltflange (r adapted to be connected with a boiler or the like. The interior of casing A is divided by a partition (1 into two chambers u and a In chamber af is astop-valvea", herein shown as an interiorly-threacled cup, having upon its exterior a knife-edge lip a, cooperating with a seat al on partition (6 and the projection or tongue (0 entering and closely fitting within the valveaperture in partition 0,". \Vithin the cupshaped valve 0) is screwed a sleeve a, through which extends a stem a, made at its lower end with a head a held within the cup-shaped valve a by said sleeve a Stem a is threaded, as at a, to engage a nut a, provided within a cap a", the latter being screwed into casing A. By turning stem a valve a can be opened and closed as usual. The advantage to the knife-edgc lip a is that when the valve is closed onto its seat the knife-edge a cuts through or pushes aside any scale, crust, or foreign matter which may lodge on seat (0 and in this way makes it unnecessary to repair or clean seat a er valve a as frequently as has heretofore been necessary. The tongue a) not only assists in centering and closing the valve, but also when operated pares or shaves ofi any crust or the like upon the inner face of the aperture in partition (5.

Removably fitted within inlet a is the upper screwed onto the inlet end a of the valvecasing.

Check-valve b is made upon its upper side with a central boss 5, whose top surface is preferably slightly below the top of the annular raised part valve Z), surrounding the boss. Immediately above valve Z) casing A is provided upon its interior with four arms a, radiating from a centrally-disposed boss (0, Which extends slightly below the plane of the under side of arms (4, preferably about one one-hundredth of an inch more than boss 6 is arranged below the top of the valve 6. It will thus be seen that when valve 6 is opened it will be stopped in its upward movement by boss 6 strikingboss a. The force of the impact and wear thus will normally be taken by boss (2 and boss I), which also serve to assist in centering the check-valve and preventing it from wearing unevenly. In case it should be forced upward a trifle unevenly the top of the annular raised part of valve 5' will engage with the under sides of arms (L and so check any tipping or side thrust. By this construction untrue action of the valve and untrue and uneven Wearing of the valvewings and. the interior of the pipe and the valve-seat are to a great degree prevented.

Casing A is made with a vent a through its Wall, opening into chamber a. This vent a is normally closed by a removable valve or stopper a, herein shown as a screw turned into the interiorly-threaded countersunk portion of vent a Vhen check-valve b is to be removed for the repair or other purpose, the stop-valve a is closed onto its seat and stopper a* removed, Which relieves the interior of easing A of all pressure, so that pipe B can be disconnected from casing A without damages or interference from steam or hot water.

At its lower end pipe B is exteriorly threaded to engage a coupling member 6 by which it is connected with a nipple C, which in turn connects with the injector or the like. Near its lower end pipe B is made with a vent b controlled by a valve 7/, that is normally closed. hen valve Z) or its seat, the end of pipe '13, needs to be reground, valve 72* is opened, thus draining that part of the conduit between valve Z) and the injector of water, the lower coupling member 6' being loosened somewhat to permit the entrance of air to take the place of the water removed. After pipe B has been drained valve (0 is closed and vent a opened,the pressure between the two valves being thereby relieved. Pipe B is then disconnected from casing A and nipple O and removed,together with valve Z), without disturbing the connection of casingA with the boiler.

What I claim is- A valve-fitting of the class described comprising a casing having an inlet and an outlet; a stop-valve in said casing provided with a knife-edge lip for cooperating with the valveseat, and a tongue to project and closely fit within the aperture of the valve-seat; a checkvalve in said casing made upon its top side with a central boss; a raised annular rim at the periphery of the top side of the checkvalve projecting beyond said central boss; a stop for the check-valve disposed between the two valves, comprising a central boss and three or more arms radiating from said boss to the walls of the casing, said boss and arms being adapted to engage with the boss and raised annular rim of the check-valve, whereby any tipping of the valve and consequent uneven wearing is prevented; a normally closed vent through the Wall of the casing between the two valves adapted to relieve the interior of the casing from pressure; and a stopper for controlling said vent; all organized and arranged substantially as described.

Signed by me at Boston, hlassachusetts, this 24th day of May, 1904.

WVILLIAM R. PARK.

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